Mac OS X Panther (10.3.3)
Regarding Amir 'CG' Caspi's missing CD/DVD System Preference Pane icon [Apr. 14], this has indeed happened to others before. I had the same experience. By Googling around on the web, I found several references to it by others. The problem is a corrupted cache file. Quitting System Preference and deleting the file com.apple.preferencepanes.cache from the folder ~/Library/Caches will take care of it. I'm not sure how or if Caspi's using VirtualPC played in the matter.
Duplicate or missing preference panes are caused by cache corruption. To resolve this:
1. Quit System Preferences.
2. Trash the file com.apple.preferencepanes.cache in your Home > Library > Caches folder
3. Empty Trash
Launch System Preferences and all should be well.
OS X should include more cache cleanup in its regular maintenance scripts.